Fisk - just in case you still visit this forum.
My wife's maternal roots lie in NE Suffolk and her ongoing family history investigations have just led to her adding 4959 Private rising to Acting Regimental Sergeant-Major Arthur Fisk to her family tree as her second cousin three times removed.
Arthur's service records, covering his 22 years and 5 months continuous army service starting in 1896 and ending in 1918, are findable on Ancestry. I suspect you have not found them as the Ancestry transcriber has read Fisk as Fish.
Assuming you are John Fisk the creator of the public Fisk Family Tree on Ancestry the photos you have of him showing off his Boer War medals on his 1910 wedding day are superb. Do you have his medals?
Regards, David Redhead of Smethwick (see Lewin-Bryant public FT on Ancestry - my wife started out a Lewin and her mother a Bryant, born in Beccles and orphaned when only 4 years old by the 1918 influenza pandemic)